2020 Mercedes-Benz GLC43 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2020 Mercedes-Benz GLC43 AMG

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2020 Mercedes-Benz GLC43 AMG cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2020 Mercedes-Benz GLC43 AMG cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

What steps should I take to diagnose the non-functioning cruise control in my 2020 Mercedes-Benz GLC43 AMG?

When diagnosing the non-functioning cruise control in your 2020 Mercedes-Benz GLC43 AMG, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable issue. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or malfunctioning, as this can directly affect the system's operation. If these initial checks do not resolve the problem, verify the speed sensor's functionality, since a faulty sensor can prevent the cruise control from engaging. Utilizing an OBD-II scanner to scan for error codes can provide valuable insights into any underlying issues. Additionally, check the brake and clutch switches, as faulty switches can inhibit the cruise control from activating. Finally, inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion, as these can lead to connectivity problems. By following this structured diagnostic approach, you can effectively identify and address the root cause of your cruise control malfunction.

What are the common problems that could cause the cruise control to stop working in a 2020 Mercedes-Benz GLC43 AMG?

When the cruise control in your 2020 Mercedes-Benz GLC43 AMG ceases to function, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is essential for the cruise control system to accurately gauge your vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the cruise control's operation, as it relies on signals from the brake system to function properly. Another potential issue is a malfunctioning throttle actuator, which can hinder the cruise control's ability to adjust the throttle position, thereby affecting its performance. Electrical problems, such as blown fuses or wiring issues, can also impede the cruise control system, leading to its failure. Lastly, software glitches within the vehicle's control module may require a software update or reset to restore functionality. By identifying and addressing these common problems, you can take the first steps toward resolving cruise control issues in your vehicle.

How urgent is it to address the malfunctioning cruise control in a 2020 Mercedes-Benz GLC43 AMG?

Addressing a malfunctioning cruise control in a 2020 Mercedes-Benz GLC43 AMG is of utmost importance due to the potential safety risks it poses. A faulty cruise control system can hinder the driver’s ability to maintain a steady speed, increasing the likelihood of accidents on the road. Moreover, such issues may signal deeper electronic system or sensor malfunctions, which could compromise other vehicle functions and lead to more significant problems down the line. Additionally, neglecting cruise control issues can adversely affect fuel efficiency and diminish the overall driving experience, as this feature is designed to enhance comfort during long journeys. Therefore, it is crucial to prioritize the repair of the cruise control system to ensure both safety and optimal vehicle performance.

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